Improvement in door and gate springs



UNTTED STATES PATENT OEEIoE.

JOHN O. GOULD, OF BOONTON, `NEW JERSEY.

IMPROVEMENT IN DOOR AND GATE SPRINGS.

Specification forming part of Letters Patent No. 58,405, dated October2, 1866.

To all whom it may concern Be it known th at I, JOHN O. GOULD, ofBoonton, in the county of Morris and State of New Jersey, have inventeda new and Improved Self-Shutter for Doors and Gates and I do herebydeclare that the following is a i'ull and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon.

Figure l is a front view of the several parts when the door is closed.Fig. 2 is a top View when the door is closed. Fig. 3 is a top view whenthe same is open.

The same letters 'ref'er to the same parts in the different figures.

B is a door attached to a casing, A, and shuts against the easin g O. Lis the threshold of the door between the two casings. D is a plate madefast to the door, and to it are attached the spring F, or itsequivalent, the lever G, and the arm H, which passes through the guide Mand through another guide, I, attached to the casing A, and has in theouter end a notch, J, which, when the door is opened, catches onto theguide I and holds the door open.

Thus it will be seen that the whole device is put together in a verysimple and compact form, and the spring having to move so short adistance,'not morel than one-fourth of an inch in opening the door wide,can be made very stift', and at the same time is not liable to break. Infact, the little tax upon it allows it, as also the lever and arm, to bemade of.' iron wire.

Another especial advantage claimed is that the spring acts withincreased pressure at the point where the door closes, and on that aecount in manyr cases is allthe fastening a door or gate needs. If neededto lessen the friction, rolls may be put in the guides I and M.

What I cla-iin as my invention, and desire to secure by Letters Patent,is-

The plate D, spring F, 0r its equivalent, lever G, larm II, with theguides I and M and the notch J, substantially as set forth, and for thepurposes named.

JOHN e. eoULD.

Witnesses:

Rev. H. D. OPDYKE, GILEs ROMINE.

